6 CEOs: Warren Buffett's brain trust

These six unit chiefs run Berkshire Hathaway's key businesses.

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Matt Rose
Company: Burlington Northern
2009 Revenues: $14.0 billion

A long-term thinker, Rose has expanded the railroad impressively. As the latest addition to Buffett's star roster, he now needs to prove he can thrive in the Berkshire culture.

By Brian Dumaine, assistant managing editor

NEXT: Tony Nicely
Last updated August 02 2010: 6:54 AM ET
Note: Figures for insurance companies are underwriting revenues.
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